.Since I came here two years ago, great changes __________ in the factory and many people want to come here to pay a visit.A have been taken place B. had been taken place C. have taken place D. are taking place
According to the psychoanalyst Sigmund Freud, wisdom comes from the _____ of maturity.
My camera can be _____ to take pictures in cloudy or sunny conditions.
Mr. Smith gradually _____ a knowledge of the subject.
His new appointment takes _____ from the beginning of next month.
It was a great _____ for him to be pleasant to people he didn't like.